Stop for sound-reproducing machines



March 18 1924.

o. F. STUPPAN STOP FOR SOUND REPRODUCING MACHINES Fue d Dec. 30. 19 21WITNESSES Patented Mar. 18, 1924.

OTTO r. sTcrrAn,

or MILWAUKEE, WISCONSIN, Assrenoa 'ro COLUMBIA GRAPHO- PHONEMANUFACTURING COMPANY, or BBIIDGEPORT, CONNECTICUT, A CORPORA- TI01\T OFDELAWARE.

STOP FOR SOUND-REPRODUCING MACHINES.

Application filed December 30, 1921. Serial NO. 526,005.

T 0 all whom it may concern:

Be it known that I, OTTO F. STUPPAN, a citizen of theUnited States, andresident of Milwaukee, in the county of Milwaukee and State ofWisconsin, haveinvented new and useful Improvements in Stops for SoundReproducing Machines, of which the following is a description, referencebeing had to the accompanying drawings, which are a part of thisspecification. a

v'lhis invention-relates to stop mechanisms, and, in the embodimentselected as illustrative of the invention, is shown as applied tosound-reproducing machines.

An object of this invention is to provide a reliable, non-set automaticstop mechanism, which is simple, and yet durable, and which will notbecome disarranged or out of order in ordinary, or even abusive, use.

In'the drawings: Fig.1-is a plan view of azdevice embodying theinvention; Fig. 2 is a side elevation view thereof; Fig. 3 is anenlarged detail plan view of the latch-mechanism.

In the drawings'the numeral 4: designates a brake member or leverpivoted on a pin 5 carried by a base plate 6 adapted to .be mounted onthe frame of the reproducing machine, saidbrake having a shoe t.engageable with the flanged edge 7 of the turntable 8 of the reproducingmachine. to stop the operation thereof, the brake being provided with ahandle 9 for setting it.

A latch 10 is pivotally mounted on a pin 11 carried by the plate 6'andis adapted to engage a notch 12 in the brake lever t and is held inengagement with said lever. by means of a spring 13 connected at one endto the ear l4: struck up from the brake lever 1 andat its other end tothe car 15 struck up from the base plate 6, said spring being offset tothe opposite side of the center of the pin 5 from that of the notch 12so that it acts to move the lever {t in a.counter-clock- Wise directionto hold the said lever against the toothed projection 16 of the latch.

When the latch 10 engages the lever saidlever will be held ininoperative position until the latch is released. For readily settingthe latch to lock the brake, I have provided a projection 17 on thelever 4; which engages a projection 18 on the latch 10 and therebycauses the projection 16 to be moved into the slot '26 in said lever.

thenotch 12 as the brake lever is swung to its inoperative position. Forreleasing the inwardly as the stylus '20, travelsinwardly 1n the grooveof the record 21, but .which acts upon said latch as soon as the stylusis latch, I provide meansinoperative while the tone-arm 19 swings givena-reverse motion upon the completion of the rendition of the record. Forthis purpose, I provide a lever 22 which is mountedon the pin 11 andoperativelyconnected with the latch '10 by means of friction disks 23.This lever i connected to move with the tone-arm 19 by apin 24iqsecuredby a clamp 25 to'said arm and engaging in When the playing of the recordiscompleted, I provide an eccentric groove 27 in the record which, whentraveled over by the stylus 20, causes an outward Or reverse movement ofthe tonearm 19 fromitsinward playing movement. With this constructionthe frictional connecplaying of the record is completed the Outtion'between the lever 22 and the latch 10 WtLIClSWlIlg of. the tone-arm bythe action ofthe eccentric groove 27 causes thelever 22 to release thelatch lO'from brake lever, this movement being very slight. butsulficient to unhook theprojection 16 of thelatch from the notch 12sothat the spring 13 may then throw or swing the brake lever 4 intoengagement with the turntable to'stop its rotation. 'By providing thecooperating projections 17 and 18. the latch may be readily maintainedin operative position by holdin the handle 9 while the operator isadjusting, the stylus upon the record preparatory to playing the same,eventhough in moving the tone-arm to its starting position a reversemovement be produced on' the lever 22. Furthermore, the anchoring of thespring upon the frame reheves the latch of any pressure from the springwhich would tendto move the latch in a radial direction toward the pin 5so that the operation of the device ismade more-sensitive than that ofmy prior construction, as the friction.v disks only have to overcome theforce which holds the brake against one side of the projection 16. Y

From the foregoing description it will be noted that it is not necessaryto provide any special setting for the release of the latch 10 on thecompletion of the playing of the record, because this release isautomatically effected by the reverse movement of the tone-arm, due tothe groove in the record. Phis eccentric groove is nothing but acircular grooi e cut in the record off center so that at one point itmeets with last groove of the record, and may be easily formed in theusual records without any special skill on the operators part.

I desire it to be understood that this in 'vention is not to be limitedto any specific form or arrangement of parts except in so far as suchlimitations are specified in the claims.

What I claim as my invention is:

1. In a sound-reproducing machine, the combination of a record with aneccentric terminal groove producing a backward swing of the tone-armwhen the playing of the record has ceased, a brake member, a latch forholding said member in inoperative position, an abutment on said memberadapted to move said latch for operatively positioning the same withrelation to said member on the movement of the brake member toinoperative position and means movable with said tone arm andoperatively connected to the latch to release the same on a backwardswing of the tone-arm.

2. In a sound-reproducing machine, the combination with the tone-arm, ofa springactuated brake, a latch for holding said brake in inoperativeposition against the action of its spring, said brake and latch havinginterengaging parts cooperating to bring the latch to locking positionwhen the brake is moved to an inoperative position, means movable withsaid tone-arm and operatively connected to the latch to release the sameon a backward swing of the tonearm, and means causing a backward swingof the tone-arm when the playing of the record is completed.

3. In a sound-reproducing machine, the combination with the tone-arm,the record and the stylus, of a pivoted brake, a spring operativelyconnected at one end to a fixed part of the machine and at its other endto said brake, a pivoted latch engageable with said brake to hold it ininoperative position, interenga-ging cooperating projections on saidbrake and latch to move the latch to locking position when the brake ismoved to an inoperative position, means moving with the tone-arm andfrictionally connected with said latch to move the same to release thebrake on a backward swing of the tone-arm, and a groove on the recordengaged by the stylus when the playing of the record is completed toproduce the backward swing of the tone-arm.

4. In a sound-reproducing machine, the combination with the tone-arm,the record and the stylus, of a base plate provided with a springmounting, a brake lever pivoted on said plate and provided with a springmounting, a spring connected to said mounting and disposed to one sideof the pivot, a notch on said lever 011 the opposite side of said pivot,a pivoted latch engageable with th notch and cooperating with the springto maintain said brake lever in inoperative position, interengagingcooperating projections on said latch and lever to move the latch tooperative position when the brake member is moved to inoperativeposition, means moving with the tone-arm and frictionally connected withsaid latch to move the same to release the brake on a backward swing ofth tone-arm, and a groove on the record engaged by the stylus when theplaying of the record is completed to produce a backward swing of thetone-arm.

5. In combination, a brake member, a detent, and cooperative meansbetween them adapted upon movement of the brake member to inoperativeposition, to move the detent into engagement with the brake member.

6. In combination, a brake member, a detent, and means on the brakemember adapted to engage the detent upon movement of the brake member toinoperative position, to move the detent into engagement with the brakemember.

7. In combination, a pivoted brake member, a pivoted detent adapted tobe engaged and disengaged with said brake member to retain or releaseit, and cooperating means on the brake member and detent adapted to movethe detent to brake-retaining position in engagement with the brakemember upon movement of the brake member to inoperative position.

8. In combination, a brake member, means adapted to move the brakemember to braking position, a detent adapted to be positively engagedwith said brake member to retain the same in inoperative position, andcooperating means between said brake member and detent adapted uponmovement of the brake member to inoperative position, to move the detentto operative position in engagement with the brake member.

9. In combination, a brake member, a spring adapted to move the brakemember to braking position, a detent adapted to be positively engagedwith said brake member to retain the same in inoperative position, andcooperatng abutments on said brake member and detent adapted uponmovement of the brake member to inoperative position to move the detentt'o operative position in engagement with the brake member.

10. In a stop mechanism, a rotating element and a traveling element, andmeans whereby said traveling element is given a reverse movement at apredetermined point in its travel, a brake member, a detent adapted tobe moved into locking relation with said brake member through themovement of the brake member to inoperative position, and means havingfrictional connection with said 'detent and adapted to move the detentto release the brake member upon said reverse movement of the travelingelement.

11. A brake-lever having a notch and a projection, a catch for thebrake-lever having a locking-tongue adapted to engage the notch in thebrake-lever, and a projection adapted to be engaged by a projection onthe brake-lever whereby movement of the brake-lever causes the catch tobe positively moved to bring the locking-tongue thereon into engagementWith the notch in the brake-lever.

In testimony whereof, I affiX my signature.

OTTO F. STUPPAN,

